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Page Title:
TAble 2. Typical Bench-Scale Screening Test Experimental Design |
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 Technical Note DOER-C6
May 1999
was no difference between percent ryegrass seed germination in Blend 3 and ryegrass seed
germination in Blend 5. Seed germination was in the order of ryegrass > tomato > marigold > vinca.
Results after 21 days paralleled results obtained in the 14-day germination test. This suggests that
ryegrass may be more efficient in taking up water. In addition, it also shows that ryegrass seed may
be able to complete germination at lower water contents than tomato, marigold, and vinca.
Table 2
Typical Bench-Scale Screening Test Experimental Design
Treatments
Blend 1:
Dredged material (100 percent)
Blend 2:
Dredged material x1 percent + Cellulose y1 percent+ Biosolids z1 percent
Blend 3:
Dredged material x2 percent + Cellulose y2 percent+ Biosolids z2 percent
Blend 4:
Dredged material x3 percent+ Cellulose y3 percent + Biosolids z3 percent
Blend 5:
Fertile reference soil (control)
Plant Species
Lycopersicon esculentum (Tomato Big Boy)
1.
Tagetes patula (Marigold)
2.
Lolium multiflorum Lam. (Ryegrass Gulf Annual)
3.
Catharanthus roseus (vinca)
4.
Experimental Design
Seed germination test
5 treatments 4 species 4 replicates completely randomized block design
5 4 4 = 80 pots (10-cm-diam pots)
Plant growth test
5 treatments 4 species 4 replicates completely randomized block design
5 4 4 = 80 pots (10-cm-diam pots)
Table 3
Percent Seed Germination from Manufactured Soil Using Toledo Harbor
Dredged Material from Cell 1
Tomato
Marigold
Blends
14 Days
21 Days
14 Days
21 Days
5
83.3
2.4
86.7
2.4
93.9
2.3
93.3
2.3
4
6.7
2.4
10.0
4.1
26.7
2.4
30.0
4.1
3
10.0
4.1
26.7
6.2
63.3
8.5
76.7
8.5
2
76.7
8.5
86.7
2.4
76.7
9.5
93.3
2.4
1
0.0
0.0
13.3
4.7
6.7
4.7
10.0
7.1
Ryegrass
Vinca
Blends
14 Days
21 Days
14 Days
21 Days
5
91.7
1.2
91.7
1.2
40.0
7.1
60.0
8.2
4
68.3
9.4
70.0
0.0
0.0
0.0
0.0
0.0
3
86.7
1.2
91.7
1.2
3.3
2.3
3.3
2.3
2
80.0
0.0
86.7
3.1
3.3
2.3
23.3
5.3
1
80.0
5.8
90.7
7.1
0.0
0.0
3.3
2.3
4
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